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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2014-02-25 09:59:44 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-03-01 01:39:30 +0100 |
| commit | bd0fa9bb455d9b58ec2d7a36cd08afed9e3411b4 (patch) | |
| tree | 450e9eac17b1d86c277ae27e20d5972147ad5b8f /drivers/cpufreq/cpufreq.c | |
| parent | cpufreq: enable ARM drivers on arm64 (diff) | |
| download | linux-bd0fa9bb455d9b58ec2d7a36cd08afed9e3411b4.tar.xz linux-bd0fa9bb455d9b58ec2d7a36cd08afed9e3411b4.zip | |
cpufreq: Return error if ->get() failed in cpufreq_update_policy()
cpufreq_update_policy() calls cpufreq_driver->get() to get current
frequency of a CPU and it is not supposed to fail or return zero.
Return error in case that happens.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
| -rw-r--r-- | drivers/cpufreq/cpufreq.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 5815af50d3de..56b7b1be352d 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2139,6 +2139,11 @@ int cpufreq_update_policy(unsigned int cpu) */ if (cpufreq_driver->get) { new_policy.cur = cpufreq_driver->get(cpu); + if (WARN_ON(!new_policy.cur)) { + ret = -EIO; + goto no_policy; + } + if (!policy->cur) { pr_debug("Driver did not initialize current freq"); policy->cur = new_policy.cur; |